Subzero: Add 'not' to the list of LLVM commands in lit.cfg.

Without this being in the command substitutions list, lit will rely on the 'not' command being in $PATH.

The substitution code is adapted from llvm/test/lit.cfg to add word-break regexps to the list.

BUG= none
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/344063004
1 file changed